Steam-boiler



2 Sheets-Sheet 1';

(No Model.)

A. HfiBERER.

STEAM BOILER.

No. 395,780. PaLte nted Jan. 8, 1889.

(No Model.) 2 Sheets-Sheet 2.

A. HEBERER.

STEAM BOILER.

Patented Jan. 8, 1889.

I UNlTED STATES PATENT EEToE.

STEAM" BOILER.

SPECIFICATION forming part of Letters Fatent No. 395,780, dated January8, 1889.

Application filed May 16, 1888. Serial No. 274,076. (No model.)

To all whom it may concern.-

Be it known that I, ADAM I-IEBERER, a cit izen of the United States,residing in the oil y of Alameda, in the county of Alameda and State ofCalifornia, have invented certain new and useful Improvements in TubularSteam- Boilers; and I do hereby declare that the following is a full,clear, and exact description of my said invention, reference beinghad tothe accompanying drawings, that form part of tl ll specification.

My invention relates to improvements in steam boilers or generators ofthe horizontal tubularkii'ld; and it consists in a certain novelconstruction and combination of central fire space or chamber andsurrounding water spaces and passages, substantially as hereinafterfully described, and the production of an improved boiler h avin g greath eating capacity and other features and qualities of value.

The following description explains the nature of my said invention andthe manner in which I have constructed, combined, and applied the samein producing my improved boiler, the accompanying drawings'beingreferred to by figures and letters.

Figure l is a side elevation of a boiler cou- I structed in accordancewith my invention, portions of the outer shell being broken away to showtheinside. Fig. 2 is across-section taken 1 Fig. 3 is a lonat about theline .1, Fig. 1. gitudinal section taken horizontally at about the line.20 1 Fig. 1. constructions of fire-box for the boiler.

In carrying out my improvements I con struct a shell or body, A,substantially of cylindrical shape in its cross-section, and in thecenter I form a fire chamber or passage, B,for the full length of thebody andof rectangular shape in vertical cross-section, these parts beling formed of plates laid and riveted in the usual manner well known toboiler-makers. The width of the fire-chamber is less than the diameterof the outer shell, and the proportions of the two parts in the verticalmeasurements are such that the room or space above and also beneath thefire-chamber is substantially of a semi-cylimlrieal shape in verticalsection. in the drawings. They connect with each other through a seriesof spaces or passages Figs. and 5 represent These water-spaces are seenat C C arranged and constructed separately between the vertical sides ofthe fire-chainber and the sides of the outer shell, and as the shell is:fiattened at the sides to make the walls of these passages parallel theoutline of the body in vertical cross-section becomes oblong or somewhatoval, as will be seen in Fig.

l) D D are the vertical water-passages coir nectin g the top and bottomchambers. Between the passages I) I), along the sides of theboiler, areopenings which lead directlyinto thefirechamber, as will be more fullydescribed.

Extending through the fire-chamber and connecting the two spaces 0 0together is a number of upright tubes, E E, that are fixed in the usualway at top and bottom in the sheets of the fire-chamber and in closeorder from end to end oi? said fire-chamber, which preferably extendsthe full length of the chambers C. To present these tubes in the mosteffective manner to the fire I set them in staggered rows, so that thetubes in one row shall not be covered by those in the preceding row, andthe flames and gases in passing from end to end of the fire-chambershall as far as possible be brought in contact with the sides and thegreater portion of the tube-surface, and not against the front of thetubes principally. By settingthe tubes in alternate order the firepasses circuitously through the rows from the fire-bov end to thesnmke-chamlier G at the oppos e end.

The fire-chamber is fixed and supported in 1 place by suitable bolts andbraces; but as the manner ot setting and bracing the same in the shellwill be understood by the practical boiler-maker, no particular mode ofconstrucl tion in that respect is given in the drawings, 1 to befollowed in carrying my improvements into actual use.

Such number and disposition of bolts and braces will be employed as thejudgment of l the practical builder may consider necessary.

The grate-surface can be formed directly within the shell, asillustrated in Fig. 4, or it l can be arranged at the end in abrick-work setting, as shown in Fig. 5. In either form the fire-chamberwill be a continuation of the fire box or space directly through thecenter of the boiler, and the water-space of the boiler surrounds thesame on all sides. This consteam-room in the upper struction, therefore,enables me to dispense with brick-work or other setting along the sides,and only legs or piers under the boiler need be used.

To facilitate cleaning, suitable man-holes and hand-holes are providedin the heads ot' the boiler, and for cleaning 1 he hre-chamberopenings II are provided in the outer shell at the sides, through which access canbe had to the tubes across the fire-space, so that the surfaces can bereached and thm-(mghly cleaned. The openings l are closed by plates ordoors K K, lined. on the inside with a course of firebriek or tiles.

In the operation of this improved boiler, the working waterline shouldstand over the top sheets of the fire-clm-mber, but leaving ample partof the space with which the steam -drum is connected. l Suitable.it'eed-water pipes, gages, blow-oif cocks, and other necessaryattachments are supplied for proper workin but as these are not parts ofmy said improvements I have not described nor shown them.

The advantages obtained in these improvements include great capacity formaking steam and freedom from scale deposits, and consequentcleanliness.

Having thus fully described my invention, l

what I claim as new, and desire to secure by Letters Patent, is

1. A steam boiler or generator having a central. fire chamber orpassage,water-chambers O above and beneath the fire-chamber, a series ofseparate vertical connecting passages, D D, onv each side between thelire-chamber and outer wall, and upright tubes E E, extending throughthe fire-chamber and connecting the said vertical chambers above andbeneath the fire-chamber with each other, substantially as described.

In a steamboiler or generator, an outer shell or body, A, a centralfire-chamber, B, generating-chainbers C above and beneath thelire-chamber, upright tubes E E, a series of separate verticalconnecting passages, D D, along the sides of the fire-chamber connectingthe generating-chambers C 3, and openingsl I at the sides through theouter shell between the end walls of passages D .l'), in combina- .tion,substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand andseal.

ADAM HEBERER. [L. s] Witnesses:

CHAS. D. WHEAT, EDWARD E. OSBORN. if

